Polysaccharides always:

A. are a string of three or more sugar molecules.

B. are polymers.

C. contain lipids.

D. All of the above are correct.

E. Only the first and second choices are correct.

Option E

Explanation:

Polysaccharides are long chains of carbohydrate molecules, specifically polymeric carbohydrates composed of monosaccharide units bound together by glycosidic linkages.

Monosaccharides are simple sugars, like glucose. Special enzymes bind these small monomers together creating large sugar polymers, or polysaccharides. A polysaccharide is also called a glycan.

Answer: B). are polymers.

Explanation: Polysaccharides are a class of carbohydrates that contains more than twenty monosaccharide units joined by glycosidic bonds. Polysaccharides may have hundreds or thousands of monosaccharides units. Polysaccharides are sugar polymers made up of monosaccharides units joined by glycosidic linkage. They are also called glycans.

Monosaccharides are carbohydrates containing one sugar molecule. A disaccharide is a carbohydrate containing two sugar molecules joined by a glycosidic bond. An oligosaccharide is a carbohydrate containing two or more sugar molecules but less than twenty sugar molecules joined by glycosidic bonds.

Examples of polysaccharides are starch, glycogen, cellulose and chitin.